With the rapid development of photovoltaic power generation technology, it has been widely used in the global power grid. To solve the problem of power supply reliability in the power system, photovoltaic cables are being used more and more widely.
There are various classifications of photovoltaic cables, which are divided into DC cables and AC cables according to the different ways of use.
The main characteristics of AC cables are stable voltage resistance, good heat resistance, excellent insulation performance, and long service life, which can be used in the DC power network. Insulation performance is the main condition of photovoltaic cable high-voltage resistance and heat resistance, what should be paid attention to this?
The application of photovoltaic cable is very wide, if the photovoltaic cable is compared to a lamp in a family, then, if we use photovoltaic cable, we can certainly light up our lives.
Photovoltaic Cables Also Have Different Classification Modes and Characteristics
For example, photovoltaic cables can be divided into low-smoke halogen-free flame retardant cables and low-smoke flame retardant cables.
Low smoke halogen-free flame retardant cable: generally good flame retardant performance and low price. Low-smoke halogen-free flame-retardant type cable is suitable for low-smoke grade power station equipment cable structure requirements with flame retardant properties and corrosion resistance.
Low smoke halogen-free flame retardant type cable is suitable for power station equipment with special fire requirements.
Low-smoke halogen-free flame retardant type cable is suitable for power station equipment with special fire requirements of cable structure requirements with special fire resistance, but the cost is higher.
1. low smoke halogen-free copper core cable in the ambient temperature of -40 ℃, the insulation resistance should not be less than 10 MΩ, and the maximum does not exceed 120 MΩ.
When the ambient temperature is 30℃, the insulation resistance of the cable should be no less than 10 MΩ and no more than 120 MΩ at the highest.
When the ambient temperature is over 30℃, the insulation resistance of the cable should be no less than 10 MΩ.
The wire is made of a metal conductor. The core diameter is less than 3 mm. the insulation thickness is less than 5 mm.
The insulation consists of a high-purity copper core and has high fire resistance.
The insulation and outer sheath are a three-layer conductor composite made of insulating material. It has good electrical conductivity and good flame-retardant properties. It has good tensile strength and toughness to withstand factors such as harsh environments and temperature changes and has strong heat and cold resistance.
Strong chemical resistance.
High mechanical strength.
Good insulation performance and can withstand high-intensity current shock.
It is also very suitable for solar panel wires and auxiliary conductive cores and other power system wire connection devices and other occasions to choose from! It can be used to transmit electrical energy and control light, heat, and other electrical equipment and systems to work safely.
2. low smoke halogen-free flame retardant copper core cable at -50 ℃, a tensile strength of not less than 300 N/mm2, and the maximum allowable tensile rate of not less than 40 m / s.
Use temperature:-50℃ or below, suitable for transporting steam, water, gas, or other corrosive gases, not in direct contact.
This is very important because, in the transportation process, high temperature and corrosion will seriously affect the operation of the power system.
For cables, we must choose cable products from manufacturers of good quality.
Therefore, strict quality control should be carried out on distributors during the sales process. If we use them improperly, the products may have problems or be damaged (need to be repaired), or they may cause casualties or even greater losses.
Therefore, we must ensure that the cable cannot be damaged during the transportation process.
So What Is Cable Material?
Cable material is made of wire and cable as raw material. For example, power cables used in the production process of insulation, sheathing, sheath materials, and other major purposes are insulator materials.
“Insulation” is one of the basic functions of electrical insulation.
“Sheathing” is a protective material used to prevent damage to electrical insulation and reduce electromagnetic interference.
When the conductor is made of metal, it also needs to be strong enough to ensure a tight connection between cables and prevent arcing.
When the conductor is heated to a molten state, gases are generated.
If these gases are generated in the cable enclosure, they can be toxic and potentially harmful to humans.
In addition, when used in systems with high voltage levels, electrical shock or short circuits can occur.
Since high-voltage discharges can be very destructive at room temperature, photovoltaic cables must be strong enough to avoid such accidents. Therefore, it is necessary to choose a good flame retardant and good quality.